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Adaptive central moment descent for broadband scattered light manipulation
Optics Letters
|August 2, 2025
Summary
We developed an adaptive central moment descent (ACMD) method to improve wavefront shaping through scattering media. This technique enhances speckle contrast, outperforming conventional methods for accurate light control and matrix reconstruction.
Area of Science:
- Optics and Photonics
- Biomedical Imaging
- Wave Phenomena
Background:
- Wavefront shaping offers precise light control through scattering media using the scattering matrix.
- Conventional phase retrieval methods struggle with broadband light due to reduced speckle contrast and background noise.
Purpose of the Study:
- To introduce a novel method, adaptive central moment descent (ACMD), to enhance speckle contrast for improved wavefront shaping.
- To overcome limitations of conventional methods in scattering media imaging with broadband light.
Main Methods:
- Implemented adaptive central moment descent (ACMD) for high-order central moment processing.
- Utilized scattered femtosecond pulses and their second-harmonic signals for experimental validation.
Main Results:
- ACMD significantly enhances speckle contrast compared to conventional methods.
- Demonstrated superior performance of ACMD across diverse scattering conditions.
- Achieved accurate scattering matrix reconstruction and precise wavefront control.
Conclusions:
- ACMD provides a robust solution for wavefront shaping in scattering media, especially with broadband light.
- The method offers improved accuracy and control for advanced optical imaging applications.
